Quote:
Originally Posted by terboboost
Just because 275-300 is maybe ok doesn't mean it is ideal. Your oil WILL start breaking down at those temperatures. How about running that known-good synthetic 30- or 40- weight, with a simple air to oil cooler at 200-230 temps for maximum reliability?
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IMO the reliability of an aftermarket oil cooler is *way* more suspect than the reliability of running synthetic oils up to 275F *calculated*, 255F sump temp.
A quality conventional motor oil will tolerate oil sump temperatures up to 250 degrees, but starts breaking down over 275 degrees.
A full-synthetic oil will withstand sump temperatures in excess of 300 degrees
https://www.motortrend.com/how-to/en...0260%20degrees.